21391048

素因数分解:

$2^3\times 7^2\times {\mathrm{197}}^1\times {\mathrm{277}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 47062620

約数和(自身を除く): 25671572

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 197, 277, 392, 394, 554, 788, 1108, 1379, 1576, 1939, 2216, 2758, 3878, 5516, 7756, 9653, 11032, 13573, 15512, 19306, 27146, 38612, 54292, 54569, 77224, 108584, 109138, 218276, 381983, 436552, 763966, 1527932, 2673881, 3055864, 5347762, 10695524, 21391048]

約数ペア:

[(1, 21391048), (2, 10695524), (4, 5347762), (7, 3055864), (8, 2673881), (14, 1527932), (28, 763966), (49, 436552), (56, 381983), (98, 218276), (196, 109138), (197, 108584), (277, 77224), (392, 54569), (394, 54292), (554, 38612), (788, 27146), (1108, 19306), (1379, 15512), (1576, 13573), (1939, 11032), (2216, 9653), (2758, 7756), (3878, 5516)]